fix(core): raise the nx package vitest timeout to cover the graph recompute spec (#36850)

## Current Behavior

`project-graph-incremental-recomputation.spec.ts` times out at exactly
35,000ms on CI on every run that executes it. Three consecutive runs on
one branch clipped at 35,009ms, 35,018ms and 35,070ms on the same test.
Master rarely shows it: most commits do not touch `packages/nx`, so
`nx:test` is served from cache, and 9 of the last 12 master commits
never ran the spec.

## Expected Behavior

The spec has enough budget to finish on CI hardware. With the limit
raised for measurement, the slowest test needs 42.4s and its neighbours
land at 32s and 29s; the whole suite went green with no other change.
Locally the same test swings between 7s and 23s depending on pool load,
so a 35s ceiling sits inside the spec's own variance once CI's roughly
5x slowdown is applied. 90s clears the measured worst case by 2x.

This is not a vitest transform regression: the jest preset carried the
same 35s before #36754.

## Related Issue(s)

Unblocks #36838, which is stacked on this branch and will be retargeted
to `master` once this merges.